American Universities Field Staff, California Institute of Technology. Population Program, Brown, H., & Sweezy, A. R. (1973). Population: Perspective, 1973. Freeman.
Citazione stile Chigago Style (17a edizione)American Universities Field Staff, California Institute of Technology. Population Program, Harrison Brown, e Alan Richardson Sweezy. Population: Perspective, 1973. San Francisco: Freeman, 1973.
Citatione MLA (9a ed.)American Universities Field Staff, et al. Population: Perspective, 1973. Freeman, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.